3.7% of all gun murders, and only 2.5%of total murders committed with rifles of any kind, and that includes small rifles like 10/22's, hunting rifles, and the like.
contrast that to 4.1% and 2.8%, respectively, for shotguns
and 72.4% and 49.1% for handguns. the rest of firearms murders are unknown gun types.
but hey, let's focus on the weapons LEAST likely to kill you.